AMC8 2001
AMC8 2001 · Q7
AMC8 2001 · Q7. It mainly tests Area & perimeter.
What is the number of square inches in the area of the small kite?
小风筝的面积有多少平方英寸?
(A)
21
21
(B)
22
22
(C)
23
23
(D)
24
24
(E)
25
25
Answer
Correct choice: (A)
正确答案:(A)
Solution
(A) The area is made up of two pairs of congruent triangles. The top two triangles can be arranged to form a $2 \times 3$ rectangle. The bottom two triangles can be arranged to form a $5 \times 3$ rectangle. The kite’s area is $6 + 15 = 21$ square inches.
(A)该面积由两对全等三角形组成。上面的两个三角形可以重新排列组成一个 $2 \times 3$ 的长方形。下面的两个三角形可以重新排列组成一个 $5 \times 3$ 的长方形。风筝的面积为 $6 + 15 = 21$ 平方英寸。
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